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Publication of FR550723ApublicationCriticalpatent/FR550723A/fr
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
G03B3/02—Focusing arrangements of general interest for cameras, projectors or printers moving lens along baseboard
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Physics & Mathematics
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FR550723D1922-04-281922-04-28Perfectionnements dans les montures d'objectifs de chambres noires
ExpiredFR550723A
(fr)